import java.io.File;

public class demo5 {
    public static void main(String[] args) {
        File file = new File("./test");
        // 创建 目录
        file.mkdir();
        File file1 = new File("./test/ret/count");
        // 创建多级目录
        boolean ret = file1.mkdirs();
        System.out.println(ret);
    }
}
